The Gilder Lehrman Institute just added a new podcast on Abraham Lincoln’s political career during the early 1850s. In “Lincoln at Peoria: The Turning Point,” Lewis E. Lehrman explains how in October 1854 Lincoln “argu[ed ] that slavery was incompatible with the Founders’ vision of America as articulated in the Declaration of Independence.” While House Divided does not have a transcript of Lincoln’s speech, one is available through the University of Michigan Digital Library.